Step-parents and infanticide: new data contradict evolutionary predictions

Evolutionary psychologists have hypothesized, inspired by evolutionary biology, that parents should care less for children with whom they are not genetically related since these young do not contribute to the genetic fitness of the parents. Based on this, evolutionary psychologists have predicted that there will be an overrepresentation of step-parents as offenders in family-related killings of children. Data on child homicide, particularly from Canada, have supported this prediction in that the frequency of children killed was relatively high in families where one of the two parents was a step-parent. Here we present a survey of all child homicide that occurred in Sweden between 1975 and 1995. In contrast to the Canadian data, children in Sweden living in families with a step-parent were not at an increased risk compared with children living together with two parents to whom they were genetically related. In addition, there were no other indications that step-parents are overrepresented as offenders.     

Determination of groups at risk for acute intestinal infections by a population questionnaire

Questionnaires were distributed in 3308 families divided into two groups: group 1 with no cases of acute intestinal infections and group 2 where such cases were registered. Information contained in the questionnaires was processes by means of computers bzsm-6. The analysis of the data on the occurrence of characteristics indicating the quality of water supply and water consumption (25 characteristics), sewage and sanitation (12 characteristics), living conditions (19 characteristics) showed that the living conditions of the families in group 2 were worse than those of the families in group 1. The occurrence of these characteristics in the families of patients with acute intestinal infections and in the families of carriers were mostly the same, and the existing differences in such characteristics as "fishing", "use of water from ponds for house-hold purposes" proved to be nonessential. The population of the city was divided into four risk groups with regard to the possibility of contacting infection, depending on the conditions of water supply, water consumption and sewage in different housing areas: the group registered as stable on account of sanitary and hygienic conditions, the groups of usual, increased and maximum risk.     

The comparison of forensic-psychiatric traits between female and male perpetrators of murder or attempted murder

The aim of this investigation was to define more clearly specific forensic-psychiatric characteristics of female murder or attempted murder perpetrators. The retrospective method applied was based on the comparison of the data from forensic-psychiatric assessments carried out in the Center for Forensic Psychiatry, Psychiatric Hospital Vrapce, Zagreb, from 1983 to 1997 (including 70 female and 70 male subjects--who committed murder or attempted murder). Compared with men, female offenders were most often in some way emotionally related to their victims, and they were more often victimized themselves before committing the crime. In men alcoholism was a more significant circumstantial factor in the assessment of their accountability. Psychiatric security measures were more often given to male offenders. The intensity of aggression was lower in females than in males. This investigation reveals that there are some sex specific forensic-psychiatric traits of murder or attempted murder perpetrators. The obtained results could be of help in everyday forensic-psychiatric practice, both in assessments and treatment.     

Correspondence

The Negev Bedouin today are living from a mixed economy, the mainstay of which is cereal farming, but they do regard themselves as primarily camel and sheep raisers and the husbandry of small stock is very important. In this article, the author looks at the relationship between spouses in the context of the domestic developmental cycle and the varying resources available to the spouses as the family cycle changes. In certain conditions one can find that the relative position of the women improves over the years while that of the husband also declines. This is largely due to the close links between a woman and her sons, based on joint interests, often directed against the father‐husband.     

Poxvirus genome evolution by gene gain and loss

The poxviruses (Poxviridae) are a family of viruses with double-stranded DNA genomes and substantial numbers (often >200) of genes per genome. We studied the patterns of gene gain and loss over the evolutionary history of 17 poxvirus complete genomes. A phylogeny based on gene family presence/absence showed good agreement with families based on concatenated amino acid sequences of conserved single-copy genes. Gene duplications in poxviruses were often lineage specific, and the most extensively duplicated viral gene families were found in only a few of the genomes analyzed. A total of 34 gene families were found to include a member in at least one of the poxvirus genomes analyzed and at least one animal genome; in 16 (47%) of these families, there was evidence of recent horizontal gene transfer (HGT) from host to virus. Gene families with evidence of HGT included several involved in host immune defense mechanisms (the MHC class I, interleukin-10, interleukin-24, interleukin-18, the interferon gamma receptor, and tumor necrosis factor receptor II) and others (glutaredoxin and glutathione peroxidase) involved in resistance of cells to oxidative stress. Thus "capture" of host genes by HGT has been a recurrent feature of poxvirus evolution and has played an important role in adapting the virus to survive host antiviral defense mechanisms.     

The sexual psychopath in California

In California sexual offenders apprehended by the law are examined by court-appointed psychiatrists to determine whether they are "sexual psychopaths" as defined by California law and need treatment in a mental hospital. This paper outlines the criteria to be used as guides in properly selecting the persons for treatment. In general, sexual offenders fall into four categories. The first group consists of persons who cannot maintain proper control over their sexual impulses but whose acts do not constitute them a menace to the health and safety of others. They are not "sexual psychopaths" and their cases should be handled on their legal merits. The second group embraces persons who have committed a sexual offense on only one occasion and while under the influence of abnormal or unusual environmental stress. They are not considered "sexual psychopaths."The third is made up of persons completely out of step with the social culture. They often have long criminal histories or long histories of social maladjustment. They are impulsive in their behavior and not remorseful of their misdeeds. Sexually deviant acts committed by such individuals are often incidental to their general asocial and amoral behavior. They do not suffer from inability to control sexual impulses. Their offenses should be judged according to the legal merits of the case.True "sexual psychopaths" have deviant menaceful sexual impulses and are not able to control them. The vast majority of these persons are those who have committed sexual offenses against children. The California State Department of Mental Hygiene has a maximum security hospital which is charged with the care and treatment of "sexual psychopaths."     

Lead Poisoning in Rural Scotland

Nine people from four families living in rural parts of Scotland have been found to suffer from clinical or biochemical effects of lead poisoning. Five had symptoms and four had unequivocal evidence of excessive lead exposure. The source of lead has been traced to the domestic water supply which in all cases was grossly contaminated with lead acquired from lead plumbing systems, including lead storage tanks. Clinical improvement followed the replacement of lead piping in two families studied. Lead poisoning is a possible cause of chronic ill health in areas of plumbosolvent water.     

Improving Negative Emotion Recognition in Young Offenders Reduces Subsequent Crime

Background

Children with antisocial behaviour show deficits in the perception of emotional expressions in others that may contribute to the development and persistence of antisocial and aggressive behaviour. Current treatments for antisocial youngsters are limited in effectiveness. It has been argued that more attention should be devoted to interventions that target neuropsychological correlates of antisocial behaviour. This study examined the effect of emotion recognition training on criminal behaviour.

Methods

Emotion recognition and crime levels were studied in 50 juvenile offenders. Whilst all young offenders received their statutory interventions as the study was conducted, a subgroup of twenty-four offenders also took part in a facial affect training aimed at improving emotion recognition. Offenders in the training and control groups were matched for age, SES, IQ and lifetime crime level. All offenders were tested twice for emotion recognition performance, and recent crime data were collected after the testing had been completed.

Results

Before the training there were no differences between the groups in emotion recognition, with both groups displaying poor fear, sadness and anger recognition. After the training fear, sadness and anger recognition improved significantly in juvenile offenders in the training group. Although crime rates dropped in all offenders in the 6 months following emotion testing, only the group of offenders who had received the emotion training showed a significant reduction in the severity of the crimes they committed.

Conclusions

The study indicates that emotion recognition can be relatively easily improved in youths who engage in serious antisocial and criminal behavior. The results suggest that improved emotion recognition has the potential to reduce the severity of reoffending.     

THE ENZYMATIC RESPONSE OF ASTROCYTES TO VARIOUS IONS IN VITRO

The effect of environmental ion concentration on the enzyme activity of astrocytes was investigated in tissue cultures of rat cerebral cortex. It was found that the oxidative enzymatic activity (succinic dehydrogenase, DPN-diaphorase, and several other enzymes) of astrocytes depended on the concentration of NaCl in the environment. This response was not specific for NaCl, but was also elicited by MgCl₂ and LiCl; the response was less consistent, and often questionable for KCl. However, only NaCl could elicit enzymatic changes in astrocytes at concentrations known to be present in a living organism. Astrocytes were the only cells which responded this way; it appeared that the foot-plates were particularly involved in the response since increase of enzyme activity occurred earlier in the foot-plates than in the perikarya. It was concluded that astrocytes are metabolically involved in the maintenance of the ionic and osmotic environment of the central nervous system, particularly in regard to the active transport of sodium.     

Do Characteristics of Parental Child Homicide in Sweden Fit Evolutionary Predictions?

Evolutionary models have been used to explain parental child homicide. One idea is that children with low fitness value to their parents will be less loved and cared for and therefore more at risk in conflict situations. It is then important to investigate if conflicts with the children are the major pattern in cases of parental child homicide. The aim of this study is to survey the background circumstances of parental child homicide in Sweden and relate them to the evolutionary model suggested. We more specifically investigate if the homicides occur in conflict situations with the child, the frequency of several victims (including the partner or former partner) and if there are differences in characteristics of homicides between stepparents and genetic parents. Our results show that parental child homicide is a heterogeneous phenomenon, where relatively few cases were the result of a conflict with the child‐victims. Instead severe conflicts between parents were the most common circumstance in which children were killed. Many children were victims of an extended suicide, which often included several members of the family. Step‐parents were more likely to kill children aggressively in conflicts with them than genetic parents. The complexity of the phenomenon suggests that an evolutionary model based upon a mechanism related to conflicts with the child‐victim has limited explanatory value on parental child homicide in general.     

Criminal offending as part of an alternative reproductive strategy: investigating evolutionary hypotheses using Swedish total population data

Criminality is highly costly to victims and their relatives, but often also to offenders. From an evolutionary viewpoint, criminal behavior may persist despite adverse consequences by providing offenders with fitness benefits as part of a successful alternative mating strategy. Specifically, criminal behavior may have evolved as a reproductive strategy based on low parental investment reflected in low commitment in reproductive relationships. We linked data from nationwide total population registers in Sweden to test if criminality is associated with reproductive success. Further, we used several different measures related to monogamy to determine the relation between criminal behavior and alternative mating tactics. Convicted criminal offenders had more children than individuals never convicted of a criminal offense. Criminal offenders also had more reproductive partners, were less often married, more likely to get remarried if ever married, and had more often contracted a sexually transmitted disease than non-offenders. Importantly, the increased reproductive success of criminals was explained by a fertility increase from having children with several different partners. We conclude that criminality appears to be adaptive in a contemporary industrialized country, and that this association can be explained by antisocial behavior being part of an adaptive alternative reproductive strategy.     

The flexible grouping and behavioral character of a flock of Suffolk ewes (Ovis aries)

The spatial patterning and grouping behavior of domestic sheep (Ovis aries) under ranch management was studied. Activity was highly synchronized among flock members and was often initiated by several individuals, but no specific individual was always responsible. In the pasture, they were not randomly dispersed, but stayed together, and individuals did not develop specific favorite areas. They usually split into several groups. The size and composition of the group was very flexible and changed often. The group did not have fixed members, although there seemed to be certain partiality for an individual's association. In certain situations, the sheep sometimes formed a large flock composed of most members. They showed 2 types of flock formation: splitting into small groups, and assembling into one large group. They changed immediately from one formation type to another, without any particular individual's initiation. They seemed to have preference for association partners in a flock, but this was not found to be a determinant factor of subgroup composition. Furthermore a large group is not formed from the association of other stable subgroups. They seemed to be attracted by co-existence or the “flock” itself, rather than association with preferred individuals.     

Guilds or functional groups: does it matter?

Although most researchers use the terms "guild" and "functional group" more or less synonymously, these two concepts bear different meanings. The guild concept refers primarily to the mechanisms of resource sharing by species in a competitive context whereas the functional groups concept is concerned with how a resource or any other ecological component is processed by different species to provide a specific ecosystem service or function. In many cases but not necessarily all, the two concepts are the two "faces" or "sides" of the same coin: the sharing by species of a similar resource is the guild facet (structural), while the ecosystem processes these species eventually perform through resource exploitation is the functional group facet. The two concepts differ in that competitive relationships within groups of species are not the focus of the functional group approach, exactly as processes or functions are not the focus of the guild approach. A group of species can be considered either as a guild or a functional group depending on the question addressed. Guild and functional group membership is independent of phylogenetic relationships but because species tend to share similar life history traits and adaptations through common evolutionary history, guild and functional group associates are often closely related. The concept of guild has had broader application in animal studies than in plant studies, whereas the reverse is true for the concept of functional group. Recent methodological advances to objectively partition species into guilds and functional groups, taking into consideration the most relevant characters or traits for delineating them, provide the means to construct an operational framework for making in situ and ex situ experiments that are urgently needed for a better understanding of the role of species in ecosystem functioning, especially in relation to global change concerns.     

The evolutionary radiation of plesiadapiforms

Very shortly after the disappearance of the non‐avian dinosaurs, the first mammals that had features similar to those of primates started appearing. These first primitive forms went on to spawn a rich diversity of plesiadapiforms, often referred to as archaic primates. Like many living primates, plesiadapiforms were small arboreal animals that generally ate fruit, insects, and, occasionally, leaves. However, this group lacked several diagnostic features of euprimates. They also had extraordinarily diverse specializations, represented in eleven families and more than 140 species, which, in some cases, were like nothing seen since in the primate order. Plesiadapiforms are known from all three Northern continents, with representatives that persisted until at least 37 million years ago. In this article we provide a summary of the incredible diversity of plesiadapiform morphology and adaptations, reviewing our knowledge of all eleven families. We also discuss the challenges that remain in our understanding of their ecology and evolution.     

A behavior model for Australopithecus africanus

The fossil remains of Australopithecus africanus attest to the widespread practice of homicide and cannibalism. Among living carnivores and primates, the only species to exhibit both cannibalism and intraspecific killing on this scale are Canis lupes, Crocuta crocuta, and Panthera leo. These species share a common diet and a multi-male, territorial group social structure. They probably also shared that with A. africanus. Contemporary primitive societies have more vegetal matter in their diets than these social carnivores but they exhibit similar behavior. This suggests that sometime in the recent past they had more meat in their diets.     

Family Structure as a Correlate of Organized Sport Participation among Youth

Organized sport is one way that youth participate in physical activity. There are disparities in organized sport participation by family-related factors. The purpose of this study was to determine whether non-traditional family structure and physical custody arrangements are associated with organized sport participation in youth, and if so whether this relationship is mediated by socioeconomic status. Data were from the 2009–10 Health Behaviour in School-aged Children survey, a nationally representative cross-section of Canadian youth in grades 6–10 (N = 21,201). Information on family structure was derived from three survey items that asked participants the number of adults they lived with, their relationship to these adults, and if applicable, how often they visited another parent outside their home. Participants were asked whether or not they were currently involved in an organized sport. Logistic regression was used to compare the odds of organized sport participation according to family structure. Bootstrap-based mediation analysis was used to assess mediation by perceived family wealth. The results indicated that by comparison to traditional families, boys and girls from reconstituted families with irregular visitation of a second parent, reconstituted families with regular visitation of a second parent, single-parent families with irregular visitation of a second parent, and single-parent families with regular visitation of a second parent were less likely to participate in organized sport than those from traditional families, with odds ratios ranging from 0.48 (95% confidence interval: 0.38–0.61) to 0.78 (95% confidence interval: 0.56–1.08). The relationship between family structure and organized sport was significantly mediated by perceived family wealth, although the magnitude of the mediation was modest (ie, <20% change in effect estimate). In conclusion, youth living in both single-parent and reconstituted families experienced significant disparities in organized sport participation that was partially mediated by perceived family wealth.     

X-chromosome inactivation and mutation pattern in the Bruton's tyrosine kinase gene in patients with X-linked agammaglobulinemia. Italian XLA Collaborative Group

BACKGROUND: The diagnosis of X-linked agammaglobulinemia (XLA) is not always clearcut. Not all XLA conform to the classic phenotype and less than 50% of affected boys have a family history of immunodeficiency. Mutations in the gene for Bruton's tyrosine kinase (BTK) are responsible for the majority of agammaglobulinemia cases. However, a certain proportion of patients may have mutations involving other genes, although they show with an XLA phenotype. We performed BTK gene mutation analysis in 37 males with presumed XLA and analyzed the pattern of X-chromosome inactivation (XCI) in 31 mothers to evaluate the relevance of these approaches to diagnosis and genetic counseling. MATERIALS AND METHODS: Twenty affected males with a sporadic occurrence and 17 familial cases belonging to nine families were enrolled within the framework of the Italian Multicenter Clinical Study on XLA. We used non-isotopic RNase cleavage assay (NIRCA), followed by cDNA sequence determination to screen for BTK mutations and X-chromosome inactivation analysis for carrier detection. RESULTS: Using the cDNA-based approach, the identification of BTK gene abnormalities confirmed the clinical diagnosis of XLA in 31 of 37 affected infants. Missense was the most frequent mutational event and the kinase domain was mostly involved. In addition, nine novel mutations were identified. In sporadic cases, BTK gene abnormalities were identified in 9 out of 10 patients whose mothers had a nonrandom pattern of XCI and in 5 out of 6 patients whose mother had a random pattern of XCI. With the exception of one family, all patients with a familial occurrence and born to mothers with a nonrandom pattern of XCI had mutations of the BTK gene. CONCLUSIONS: Our findings indicate that in sporadic cases BTK gene sequencing is the only reliable tool for a definitive diagnosis of XLA and support XCI as the first diagnostic tool in the mothers of affected males in multiple generations. Furthermore, our molecular analysis confirms that 10-20% of BTK-unaltered patients have disorders caused by defects in other genes.     

Stronger social bonds do not always predict greater longevity in a gregarious primate

In group‐living species, individuals often have preferred affiliative social partners, with whom ties or bonds can confer advantages that correspond with greater fitness. For example, in adult female baboons and juvenile horses, individuals with stronger or more social ties experience greater survival. We used detailed behavioral and life history records to explore the relationship between tie quality and survival in a gregarious monkey (Cercopithecus mitis stuhlmanni), while controlling for dominance rank, group size, and life history strategy. We used Cox proportional hazards regressions to model the cumulative (multi‐year) and current (single‐year) relationships of social ties and the hazard of mortality in 83 wild adult females of known age, observed 2–8 years each (437 subject‐years) in eight social groups. The strength of bonds with close partners was associated with increased mortality risk under certain conditions: Females that had strong bonds with close partners that were inconsistent over multiple years had a higher risk of mortality than females adopting any other social strategy. Within a given year, females had a higher risk of death if they were strongly bonded with partners that changed from the previous year versus with partners that remained consistent. Dominance rank, number of adult female groupmates, and age at first reproduction did not predict the risk of death. This study demonstrates that costs and benefits of strong social bonds can be context‐dependent, relating to the consistency of social partners over time.     

Domestic minor sex trafficking and the detention-to-protection pipeline

Notable discursive changes are afoot with respect to individuals, particularly sex trade–involved youth in the United States. Where once they may have been profiled as juvenile offenders, they are now, thanks to widespread attention to human trafficking, provisionally viewed by law enforcement and their non-state allies as potential victims of domestic minor sex trafficking, replete with traumatic pasts and turbulent family histories that authorize state intervention. This article examines how anti-trafficking policies have been discursively re-imagined to expand policing and rehabilitative interventions for youth. Drawing on in-depth interviews and ethnographic observations, it tracks the discursive sites and spaces in which criminal justice and social justice agendas have coalesced to assist youth and further assesses how attention to domestic minor sex trafficking has simultaneously authorized a multiprofessional detention-to-protection pipeline.